Lock device



my 23, 1935. E J BECHERT 2,008,662

LOCK DEVI CE Filed Jan. 6, 1953 INVENTOR ATTORNEYS Patented July 23, 1935 UNI-rse STATES PATENT offici:

American Hardware Corporation, New Britain, Conn., a corporation of ACorinectiout Application January e, 41933, serial Ng. 659,433 9 Claims. (o1. F0n-9,1)

My invention relates lto a lock device and mere particularly to Imeans permitting ready removal of alock or lock part from its case.

In oce buildings, hotels, apartments, private dwellings and the like, it is often desirable or necessary to remove the lock to change the' cornbination or for other purposes, and features `tend- "ing to simplify such removal are oi importance,

It is an object of my invention to provide a lock removable in whole or in part from its case, with features to greatly simplify the removal of the lock 0r lock part.

`Another object is to provide a lock devise having' novel, simple means to permit removal of the lock by orwith the assistance oi a key.

' A further and general object of the invention is'to provide a device of the character indicated, vwhich is simple, sturdy, eiective, cheap, and not likely to get out oi order.

'i 4@ther objects will either be pointed out o r will become apparent upon a reading of the specification in connection with the drawing. "Briefly stated, in a preferred form of the invention I employ a lock case or housing such as Van ordinary lock case or door knob, all broadly compreh'ended within the term case. yA part of Athe lock and a part of the lock case have interengaging parts for norn'ially holding the lock in place. The interengaging parts may bedisengaged from each other when' the key plug isV rotated from its normal locked position to what may be termed an abnormal position. The key plug may be and usually would be connected tofa cam'or roll-back for actuating a door latch, and the door latch or other suitable means serves to limit' the rotative movementvof thekey plug during normal latchng operation. When it is desired to remove the lock to reset the tumblers prior other reasons, the keyplug and the part Aactuatedthereby such'as the roll-back orspindle may be disconnected from each other, after which ,the key plug may be rotated toits so-called abnormal position and the look as a whole, or a part thereof, such as a key plug, may be removed.

In the drawing which shows, for illustrative purv poses only, preferred forms of the invention- 'V Fig. 1 is a central, vertical, partial section through a'knob lock illustrating features of the invention;

`Fig. v2 is a sectional View taken substantially in the plane of the line 2-2 oflFig. 1;` t y Fig. 3 is a fragmentary to'p viewin horizontal section of tlie'parts`-shown'in Figl 1";l u`Fig; 4 is yaV ragmentary, vertical,` sectional View of parts shown in Fig. 1 moved to different positions byrneans ofareset keyjv` f 5 is'a View similar to Fig. 4, but illustrating a modiiied form of meansfor *holding the'l'ock' in the knob; i' 'i *i '5' M W if Fig. V6 is a sectional view taken substantially in the plane of the 'lineS-i of Fig." 5, thekey being omitted; 5

Fig. 'i is a diagrammatic end View of a lock illustrating ieatures'connected with'the invention. 1 My improved lock device may be 'associated"y with various types of locks and latches, butwill be found particularly effective when associated Awith a'latch lock as illustrated in Fig. 7, which Patent No. 1,865,123, June 28, 1932.

The latch lock shown in Fig. 7 embodies a case l' an al latch bolt il khaving a tail-piece which, yfor purposes of the present description, may sinishows the 'general type disclosed in McKinney i ply extend into the latch case and be'conneoted'to n a cross-head il.'movable'back and forth inthe 'casing'. "The cross-head and latch bolt are spring pressed outwardly by' means" of a coil spring'jl surrounding the rear extension of the tail-piece.

The crosshead I2 may be knob actuatedby means l of a cam or Vroll-back I4 offset from ythe disk" l5 i 'inthe rock case. Beneath'uie rou-back {f4-,land also engageable with the cross-head |12 'for actuating the same and the latch bolt is'akey actuated roll-back l5 connected through a second disk or otherwise `to the' spindle I1.' The latch Yboltg'of "'2 course, has limited back and forth movement, and the -rollnback IG, and consequently the'jspinllle l1, are'liinited in their rotative movement Ato vless ,than half'af`re`volution, "Thislimita'tion rn'aybe 'accomplishedtbythe rear end oftail-pi'ece 18 on the' cros'sfhead'coming in contact with fthe bak .,i i 1.2.7.1r@

PBy suitable" or conventional means, theknob roll-back'may be dogged so'as to prevent :'latchj, yactuatiin by the knob" and of course the outer lknob'li'nay'beaiied one 'asfis commoninflietel v 11 y ,lw'uil rThe invention is illustrated in the present case inconnectionwith'a knob 1ck.` As* shown more particularly 'in- Figs". i to' if the lock o'aseprjknob i" designated generally 2,9 has ashankfl' by "suitable means is connected'to thelihobcamor rollb'ack lliso that upon rotation thereof," ythe cros's-'h'eadfl may be retracted so a's'y'tofretracty.

the latch' boit il I' intne'usuai manner; ffrhegknob carries' ar lock: cohnecte'd'to latchbolt retracting means so that Whe'nthe knobfis vdogged against rotation by means (not shown) ,"the latchbolt may be retractedby a lockor'key actuated fans;v

In the form show ,the lock comprises a. :cylinder 22 carryinga rotatable key plug 23 and the pin tumbler devices of well known construction. The cylinder' lock is provided with a iinish or face-plate l2li secured thereto so as to close the opening in the knob 20 and which may also help to support the lock.

The lock and its case are provided with means to hold the lookin place under normal conditions. In the form illustrated in Figs. 1 to 4, the knob shank 2 I is provided with abutment means such as a flange 25 dening one side of a groove 26 formed annularly therein. The groove 28 is preferably annularly continuous so as to provide the abutment means entirely around the knob shank, but the abutment or flange 25 is interrupted preferably at two points 26h-26' for a purpose to be described. The key plug 23 extends into the knob shank and is provided with a coacting abutment member, as illustrated, in the form of a radially extending pin 21 to engage in rear of the abutment ange 25 so as to hold the key plug and with it the entire cylinder lock in place in the lock case or knob. The cylinder at the forward end may enter and be supported by the knob shank, and the lock assembly is positioned angularly as by means of the dowel pins shown clearly in Fig. 3.

The key plug 23 is connected to the spindle I1 so that the latter may be rotated for latch actuation. I employ what may be termed a coupler between the key plug and the spindle I'I so that the key plug and spindle may be uncoupled for a purpose to be described. In the form shown, I employ a. coupling sleeve 28, non-rotatably but slidably carried by the end of the spindle I1 as by the pin and slot arrangement 29. The coupling sleeve is pressed toward the key plug 23 by means of a spring 3E). The key plug and coupling sleeve have interengaging parts for coupling the same together and as illustrated, the key plug is transversely slotted as indicated at 3l, and the coupling sleeve 28 is provided with a tongue or key 32 to t the slot 3| so that when the slot and key are in engagement with each other, the key plug, coupler sleeve, and spindle all rotate as a unit.

With the parts positioned as illustrated in Fig. l, an ordinary pass key 33 may be employed for rotating the key plug 23 whereby the latch II may be actuated in the usual manner. The key plug 23 is limited in its rotation by means of the latch or cross-head I2 which has limited reciprocatory movement as heretofore noted. Therefore, during normal operation of the key plug by means of the pass key 33 the pin or abutment member 21 on the key plug cannot reach either of the interruptions 26 in the abutment ange 25, and consequently the key plug and associated parts are held in the lock case or knob. However, when it is desired to remove the lock from its case in order t0 permit resetting of the tumblers or for any other reason, the latch parts are disconnected from the key plug so that the latter will not be limited in its rotation and the key plug may then be turned so as to bring the abutment pin 21 opposite one of the interruptions 2G in which position the key plug or the key plug and parts associated therewith may be withdrawn from the lock case.

The key plug may be uncoupled from the latch parts by moving the coupler sleeve 28 so as to disengage the tongue 32 from the slot 3I. This uncoupling of the parts may be accomplished in various ways, but I prefer to employ a reset key having 'a llong nose Y'311, as illustrated in Fig. 4, which lnose is long .enough to engage and force the tongue 32 :from the slot 3I when the key is in position to set the tumblers so as to permit rotation of the key plug. In the position illustrated in Fig. 4, the long nose 34 on the reset key has uncoupled the'key plug 23 from the latch parts of the lock, and the key plug is therefore free to be rotated by the key and when suitably positioned may be withdrawn as heretofore described.

The knob and the cylinder lock parts may be assembled with the lock case by rst inserting the reset key and turning the key plug 23 to such position that the abutment pin 21 will enter through one of the slots 26', after which the key plug may be turned to key plug locking position by the reset key, at which time the abutment 21 will be behind the abutment 25 and the reset key may be withdrawn so as to permit the tongue 32 to move into the slot 3l so as to couple the key plug to the latch parts as heretofore described. It is also possible to assemble the parts with an ordinary pass key since the end of the key plug 23 will force the coupling sleeve 28 inwardly and when the key plug is turned to key plug locking position with the pin 21 in rear of the fiange 25, the spring will snap the tongue 32 into the slot 3 I. While the arrangement illustrated in Figs. l to 4 is simple and efficacious, it is to be understood that the lock or various lock parts may be held by means other than the abutment arrangement 25-21 and a single modification is shown in Figs. 5 and 6. As illustrated in Figs. 5 and 6, the lock parts, coupler, etc., may be substantially the same as heretofore described, except that in the latter form instead of slotting the end of the key plug and making a keyway coupler, I may provide a pair of dowels such as 35 on one of the parts such as the coupler sleeve 28 which may fit into dowel holes 35-36 in the key plug. The coupler sleeve 28, and consequently the latch parts, may be disconnected from the key plug 23 by suitable means such as the reset key having the long nose 31, as illustrated.

Instead of holding the lock parts in the lock case through the medium of the key plug itself, other means may be employed; for example, the parts may be held in by interengaging means between the lock case and the cylinder. As illustrated, the cylinder is provided with a radially inwardly spring pressed pin or locking plunger 38, the head 3S of which normally rides upon the cylindrical surface of the key plug 23 as shown more clearly in Fig. 6. The key plug may be provided with a slabbed off portion forming a depressed cam surface 4U so positioned circumferentially that during normal operation of the key plug for latch operating purposes, the cam surface 40 does not come beneath the head of the locking pin 38. However, when it is desired to remove the lock from its case, the latch parts are uncoupled, as by means of the long nosed key, and the key plug 23 is rotated so that the slabbed oi portion or cam surface 40 comes beneath the head of the pin 38, at which time the latter may spring out or be depressed from the hole or abutment .shouldery 38 so as to free the cylinder lock parts from the lock case and the lock parts may then be withdrawn from the case.

While the invention has been described in considerable detail and preferred forms illustrated,

it is to be understood that various changes and modifications may be made within the scope of the invention as defined in the appended claims.

I claim:

1. In a device of the character indicated, a lock case, a lock including a rotatable key plug, latch bolt operating means normally connected to said key plug and limiting said key plug to a fractional revolution, interengaging means between said case and key plug for holding said key plug against withdrawal during such fractional revolution, and means for disconnecting said key plug and latch bolt operating means to permit a greater degree of rotation of said key plug and disengagement of said interengaging means, whereby said key plug may be withdrawn.

2. In a device of the character indicated, a cylinder lock including a key plug, means to be actuated thereby, a releasable connection between said key plug and means, a case for said lock, and interengaging parts between said case and key plug, said parts being disengageable from each other only after release of said key plug from said means,

3. In a device of the character indicated, a lock including a key plug, a part to be actuated thereby, a connection between said key plug and part, a lock case, releasable means for normally holding said key plug relatively to said case, said key plug being releasable from said case only when said connection between said key plug and part has been broken.

4. In a device of the character indicated, a lock including a key plug, a part to be actuated thereby for limiting rotation of said plug, coupling means between said part and key plug said coupling means being actuable from the exterior of said lock for uncoupling said key plug from said part to permit further rotation of said plug and withdrawal thereof.

5. In a device of the character indicated, a lock case, a lock comprising a key plug supported by said case, a latch bolt capable of limited movement, connecting means between said latch bolt and key plug whereby said latch bolt may be key plug actuated and the rotative movement of said key plug limited by said latch bolt, interengaging means between said case and a part of said lock for holding said lock in place, said interengaging means being disengageable to permit separation of said lock and said case only when said key plug is rotated farther than permitted by said latch bolt, said connecting means between said latch bolt and key plug being disengageable topermit such farther rotation of said plus.

6. In a device of the character indicated, a lock case, a lock comprising a key plug, a member to be actuated thereby, a spring pressed connecting means between said member and key plug and operable by means inserted from the outside for disconnecting said key plug and member, and means for detachably securing said lock to said case and operable to release said lock from said case only when said key plug and member are disconnected.

7. In a device of the character indicated, a latch bolt, a roll-back and spindle for actuating said latch bolt, the rotation of said spindle being limited by said latch bolt to less than a complete revolution, a knob, a cylinder lock carried by said knob and including a key plug, said key plug and knob having interengaging parts for normally holding said cylinder lock and key plug in said knob, a coupling between said key plug and spindle and releasable to permit rotation of said plug and disengagement of said interengaging parts, whereby said cylinder lock may be removed from said knob.

8. In a device of the character indicated, a latch bolt, a roll-back and spindle for actuating said latch bolt, the rotation of said spindle being limited by said latch bolt to less than a-co-mplete h revolution, a knob, a cylinder lock carried by said knob and including a key plug, said key plug and knob having interengaging parts for normally holding said cylinder lock and key plug in said knob, a coupling between said key plug and spindle and releasable by a'key inserted in said key plug to permit rotation of said key plug and disengagement of said interengaging parts, whereby said cylinder lock may be removed from said knob.

9..In a device of the character indicated, a lock including a key plug, a latch bolt actuator, coupling means between said key plug and latch bolt actuator, said coupling means being normally in co-upling position during rotation of said key plug and when said key plug is in both locked and unlocked positions, said coupling means being movable by a special key in said key slot to uncoupling position, and spring means for normally urging said coupling means to coupling position.

FRED J. BECHERT. 

